Input Button required attribute

HTML DOM Input FileUpload Object

Definition and Usage

required Attribute setting or returning whether it is necessary to select/upload a file in the file upload field before submitting the form.

This attribute reflects the HTML required attribute.

See also:

HTML Reference Manual:HTML <input> required Attribute

Example

Example 1

Determine whether it is necessary to select/upload a file before submitting the form:

var x = document.getElementById("myFile").required;

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Example 2

Set the file upload field as a required part of the form submission:

document.getElementById("myFile").required = true;

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Syntax

Return the required attribute:

fileuploadObject.required

Set the required attribute:

fileuploadObject.required = true|false

Attribute value

Value Description
true|false

The specification of whether the file upload field should be a required part of the form submission.

  • true - The file upload field is a required part of the form submission
  • false - Default. The file upload field is not a required part of the form submission

Technical Details

Return value: Boolean value, if the file upload field is a required part of the form submission, it returns true; Otherwise return false.

Browser Support

Chrome Edge Firefox Safari Opera
Chrome Edge Firefox Safari Opera
Supported 10.0 Supported Not Supported Supported

HTML DOM Input FileUpload Object